diff --git a/src/Infrastructure/BotSharp.Core.SideCar/Services/BotSharpConversationSideCar.cs b/src/Infrastructure/BotSharp.Core.SideCar/Services/BotSharpConversationSideCar.cs
index ec3ad0fe..4ddc3a43 100644
--- a/src/Infrastructure/BotSharp.Core.SideCar/Services/BotSharpConversationSideCar.cs
+++ b/src/Infrastructure/BotSharp.Core.SideCar/Services/BotSharpConversationSideCar.cs
@@ -1,3 +1,19 @@
+/*****************************************************************************
+  Copyright 2024 Written by Jicheng Lu. All Rights Reserved.
+ 
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+ 
+      http://www.apache.org/licenses/LICENSE-2.0
+ 
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+******************************************************************************/
+
 using BotSharp.Core.Infrastructures;
 
 namespace BotSharp.Core.SideCar.Services;
diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStateService.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStateService.cs
index 152b74ca..eedcdf9a 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStateService.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationStateService.cs
@@ -1,3 +1,19 @@
+/*****************************************************************************
+  Copyright 2024 Written by Jicheng Lu. All Rights Reserved.
+ 
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+ 
+      http://www.apache.org/licenses/LICENSE-2.0
+ 
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+******************************************************************************/
+
 using BotSharp.Abstraction.Conversations.Enums;
 
 namespace BotSharp.Core.Conversations.Services;
diff --git a/src/Infrastructure/BotSharp.Core/Translation/TranslationService.cs b/src/Infrastructure/BotSharp.Core/Translation/TranslationService.cs
index 453b2277..7b81ac10 100644
--- a/src/Infrastructure/BotSharp.Core/Translation/TranslationService.cs
+++ b/src/Infrastructure/BotSharp.Core/Translation/TranslationService.cs
@@ -1,3 +1,19 @@
+/*****************************************************************************
+  Copyright 2024 Written by Jicheng Lu. All Rights Reserved.
+ 
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+ 
+      http://www.apache.org/licenses/LICENSE-2.0
+ 
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+******************************************************************************/
+
 using BotSharp.Abstraction.Infrastructures.Enums;
 using BotSharp.Abstraction.MLTasks;
 using BotSharp.Abstraction.Options;